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Finding the Fourth Proportional to 213.39, 294.45 and 135.75

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Solution

The fourth proportional to 213.39, 294.45 and 135.75 is: 187.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.39 : 294.45 = 135.75 : x
  2. Step 2: Convert to fraction form
    213.39/294.45 = 135.75/x
  3. Step 3: Cross multiply
    213.39x = 294.45 × 135.75
  4. Step 4: Simplify right side
    213.39x = 39,971.59
  5. Step 5: Solve for x
    x = 39,971.59/213.39
  6. Step 6: Final answer
    x = 187.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.